<?php
// +--------------------------------------------------------------------------+
// | Image_Graph (GraPHPite)                                                  |
// +--------------------------------------------------------------------------+
// | Copyright (C) 2003, 2004 Jesper Veggerby                                 |
// | Email         pear.nosey@veggerby.dk                                     |
// | Web           http://pear.veggerby.dk                                    |
// | PEAR          http://pear.php.net/package/Image_Graph                    |
// +--------------------------------------------------------------------------+
// | This library is free software; you can redistribute it and/or            |
// | modify it under the terms of the GNU Lesser General Public               |
// | License as published by the Free Software Foundation; either             |
// | version 2.1 of the License, or (at your option) any later version.       |
// |                                                                          |
// | This library is distributed in the hope that it will be useful,          |
// | but WITHOUT ANY WARRANTY; without even the implied warranty of           |
// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        |
// | Lesser General Public License for more details.                          |
// |                                                                          |
// | You should have received a copy of the GNU Lesser General Public         |
// | License along with this library; if not, write to the Free Software      |
// | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA |
// +--------------------------------------------------------------------------+

/**
 * Image_Graph (GraPHPite) - PEAR PHP OO Graph Rendering Utility.
 * @package Image_Graph
 * @subpackage Marker     
 * @category images
 * @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
 * @license http://www.gnu.org/licenses/lgpl.txt GNU Lesser General Public License
 * @author Jesper Veggerby <pear.nosey@veggerby.dk>
 * @version $Id: Bubble.php,v 1.1 2004/09/17 11:32:54 nosey Exp $
 */ 

/**
 * Include file Image/Graph/Marker/Circle.php
 */
require_once("Image/Graph/Marker/Circle.php");

/**
 * Dsiplay a circle with y-value percentage as radius (require GD2).
 * This will display a circle centered on the datapoint with a radius calculated as
 * a percentage of the maximum value. I.e. the radius depends on the y-value of the
 * datapoint
 */
class Image_Graph_Marker_Bubble extends Image_Graph_Marker_Circle 
{

    /**
     * The radius of the marker when 100% 
     * @var int
     * @access private
     */
    var $_size100Pct = 40;

    /**
     * Sets the maximum radius the marker can occupy
     * @param int $radius The new Image_Graph_max radius 
     */
    function setMaxRadius($radius)
    {
        $this->_size100Pct = $radius;
    }

    /**
     * Draw the marker on the canvas
     * @param int $x The X (horizontal) position (in pixels) of the marker on the canvas 
     * @param int $y The Y (vertical) position (in pixels) of the marker on the canvas 
     * @param array $values The values representing the data the marker "points" to 
     * @access private
     */
    function _drawMarker($x, $y, $values = false)
    {
        $this->_size = $this->_size100Pct*$values['PCT_MAX_Y']/100;        
        parent::_drawMarker($x, $y, $values);
    }

}

?>